Suspension Parts for 1989 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 1989 YAMAHA YZ125. Every product in this category has been validated against year-specific fork and shock specifications to ensure true compatibility.
You’ll find fork components, shock parts, shims, upgrade kits, complete suspension systems, chassis components, and the tools and fluids required for accurate servicing - all aligned with the suspension setup of the 1989 YAMAHA YZ125.

Use this page as a reliable reference when maintaining, rebuilding, or upgrading your bike’s suspension.

Bike-Specific Suspension Specifications & Setup Information

CALCULATE SPRING RATES

This is a recommendation only please consult your manual

Ideal Fork Rate:

kg/mm ( N/mm)

Ideal Shock Rate:

kg/mm ( N/mm)

BIKE DETAILS

Stock Fork Spring Rate

0.338

Stock Shock Spring Rate

4.96

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 41 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)
Fork Travel: 295 mm

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 120 mm

Fork Spring Information

Standard Preload: 10 mm

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 44 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
Shock Length (Eye to Eye): 441 mm
Shock Travel: 114 mm
Shock Shaft Outer Diameter: 16 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 14

Shock Features

Non-rebuildable: No

Shock Comments

: One-way rebound check valve

Fitment-Matched Suspension Parts by Category

FORK SEALS & BUSHES

8 Parts

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SUSPENSION LOCKNUTS & BUSHES

5 Parts

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TOOLS & LUBRICANTS

21 Parts

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All Fitment-Matched Suspension Parts

Browse All 49 Products for YAMAHA YZ125 1989

SKF 41mm KYB Fork Seal and Wiper Set

SKF Sealing

SKF 41mm KYB Fork Seal and Wiper Set

Requires 2 kits for complete fork service.
(SKU: SKF41K)

From $59.95

Colour: Green

$59.95
8 In Stock

Colour: Black

$59.95
26 In Stock

Fork Tube Slide Bushing Pair - 41mm Forks

Kayaba (KYB) Genuine Motorcycle Parts

Fork Tube Slide Bushing Pair - 41mm Forks

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110044100902)

Inside Diameter d (mm): 41.0

Fork Inner Tube Ø d (mm): 41.0

Height H (mm): 12.0

Outside Ø D (mm): 46.0

Wall Thickness (mm): 2.5

$41.58
Special Order

Rear Shock Service Kit KYB 44/16mm Oil Seal Large

Kayaba (KYB) Genuine Motorcycle Parts

Rear Shock Service Kit KYB 44/16mm Oil Seal Large

Genuine OEM Kayaba Motorcycle Suspension Parts
(SKU: 129996000801)

$57.76
Special Order

Front Fork KYB Oil 01M 1L *Discontinued*

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork KYB Oil 01M 1L Discontinued

Original KYB Suspension Lubricants
(SKU: 130010010101)

Pack Size: 1 L Pack

$48.96
Special Order

Front Fork KYB Oil 01M 5L *Discontinued*

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork KYB Oil 01M 5L Discontinued

Original KYB Suspension Lubricants
(SKU: 130010050101)

Pack Size: 5 L Bottle

$226.19
Special Order

Front Fork KYB Oil 01M 200L *Discontinued*

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork KYB Oil 01M 200L Discontinued

Original KYB Suspension Lubricants
(SKU: 130012000101)

Pack Size: 200 L Drum

$8,088.49
Special Order

KYB Grease 250ml

Kayaba (KYB) Genuine Motorcycle Parts

KYB Grease 250ml

Original KYB Suspension Lubricants
(SKU: 130062500101)

$60.50
Coming Soon

Shock Seal Head Brass Bullet 5Pc Kit

Techtool

Shock Seal Head Brass Bullet 5Pc Kit

12.5x10 | 14x12 | 16x12 | 18x12 | 18x16 mm
(SKU: 93-031-00)

$76.95
Coming Soon

SDI Nitrogen Pressure Gauge Compact

Suspension Direct International (SDI)

SDI Nitrogen Pressure Gauge Compact

Motorcycle Suspension Tools
(SKU: SDTPSI)

$242.00
Nil Stock

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